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January 19th, 2026 :: 1:34 pm CST   

Local Weather Report for
Decatur
Illinois, United States

 Decatur Weather Forecast Summary  
 
Today
Jan 19th
Tuesday
Jan 20th
Wednesday
Jan 21st
Thursday
Jan 22nd
Friday
Jan 23rd
Cloudy Cloudy Cloudy Cloudy Cloudy
14°F
28°F
13°F
37°F
31°F
29°F
23°F
15°F
-2°F
 
 Decatur Detailed Weather Forecast  
 
Monday, January 19th, 2026
Afternoon Temperature: 12°F
Sunny. Windy at times.
Evening Temperature: 13°F
Cloudy.
Tuesday, January 20th, 2026
Overnight Temperature: 13°F
Clear with cloudy periods.
Morning Temperature: 23°F
Cloudy.
Afternoon Temperature: 22°F
A mix of cloud and sun.
Evening Temperature: 27°F
Cloudy. Windy at times.
Wednesday, January 21st, 2026
Overnight Temperature: 32°F
Cloudy. Windy.
Morning Temperature: 36°F
Sunny with cloudy periods. Windy.
Afternoon Temperature: 31°F
Sunny. Windy at times.
Evening Temperature: 33°F
A mix of cloudy and clear skies. Windy.
Thursday, January 22nd, 2026
Overnight Temperature: 24°F
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 26°F
Cloudy. Windy at times.
Afternoon Temperature: 27°F
Mostly cloudy.
Evening Temperature: 25°F
Cloudy. Windy at times.
Friday, January 23rd, 2026
Overnight Temperature: 12°F
Cloudy. Windy.
Morning Temperature: 4°F
Cloudy. Windy.
Afternoon Temperature: 1°F
Cloudy. Windy at times.
Evening Temperature: -1°F
Cloudy. Windy at times.
Saturday, January 24th, 2026
Overnight Temperature: -1°F
Cloudy.
Morning Temperature: 6°F
Cloudy.
Afternoon Temperature: 10°F
Cloudy.
Evening Temperature: 10°F
Cloudy.
Sunday, January 25th, 2026
Overnight Temperature: 9°F
Clear with cloudy periods.
Morning Temperature: 13°F
Sunny.
Afternoon Temperature: 14°F
Sunny.
Evening Temperature: 11°F
Clear.
Monday, January 26th, 2026
Overnight Temperature: 10°F
Clear.
Morning Temperature: 23°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 28°F
Sunny. Windy at times.
Evening Temperature: 29°F
Cloudy. Windy at times.
Tuesday, January 27th, 2026
Overnight Temperature: 27°F
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 32°F
Cloudy. Windy at times.
Afternoon Temperature: 29°F
Cloudy.
Evening Temperature: 28°F
Cloudy. Windy at times.





 

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This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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